Most of us go 12M because it's smaller and can still be placed at the A-pillar. Imagine a 15M or 15W at the pillar. Kakakaka! Pengsan right?
Even fitting the 15M/W in the kickpanel is going to be a pain in the ass for most cars.
Netken: Are you planning to run active or passive ha?
Most of the super high-end guys are running full active with either a processor with their HU or an external electronic crossover. So, they don't run through a 20 cent parts-passive. Even if they do run passive, there isn't any shop to assist in modding the parts to higher grade ones without voiding the warranty of both the passive and components completely.
It is not in everyones blood to DIY in the first place, especially if they feel/think they have already spend a considerable sum on the equipment, thus
believe it should already be best matched by the manufacturer.
Again, bear in mind that any DIY will void the warranty. That is the reason why many have opted not to go that path unless they are willing to spend time to understand how to build proper crossover networks. Most installers are too busy maximizing profits and after the advent of high-tech and high-quality external processors and crossovers none of the installers will seriously want to turn back.
